Typewriting machine



G. G. GOING TYPEWRITING MACHINE Dec. 5, 1933.

Filed April 15, 1930 Ainnesta-1 Dec. s, 1933 UNITED STATES PATENT OFFICEMy invention relates to typewriting and like machines and moreparticularly to noiseless machines, such as the No. 6 RemingtonNoiseless, for example, in which the platen is adjustable to differentset positions towards and from the types depending on the number ofsheets being written at a single operation. The limited range .of suchadjustment of the platen is sufficient to take care of differentthicknesses of paper on 10 the platen, so that eiective, uniform andsubstantially noiseless imprints may be produced irrespective of thenumber of sheets employed. Any forward adjustment of the platen beyondthe limited range referred to above is apt to result in the productionof noise in the operation of the type actions, for reasons which willhereinafter more clearly appear, and hence such machines are ordinarilyconditioned so that the operator cannot adjust the platen beyond the 2qlimits mentioned.

It has been found, however, that in order to attain sufficient pressurefor veffectively cutting' stencil plates or cards on the machine, thebest results can be attained only by adjusting the .25 platen forwardfarther than the usual limit of l adjustment provides for. Even thoughthis may result in the production of some noise in the operation of thetype actions, it nevertheless is deemed highly desirable for effectivelycutting the stencils to provide means for attaining this unusual andordinarily undesirable extent of adjustment of the platen. It isimportant, however, that this unusual extent of adjustment be notaccidently attained and when attained at all must be with the deliberatewill and intent of the operator, with the knowledge that such adjustmentis only to be made for cutting stencils.

With the foregoing objects in view my invention consists in the featuresof construction, arrangements of parts and combinations of devices setforth in the following description and particularly pointed out in theappended claims.

In the accompanyinghdrawing, wherein like reference characters indicatecorresponding Darts in the diiferent views- Fig. 1 is a fragmentary,fore and aft, vertical, central sectional view of a portion of a No. 6Remington Noiseless machine embodying my invention.

Fig. 2 is an enlarged, detail, fragmentary sectional view of a portionof the adjusting means; the section .being taken on the line 2 2 of Fig.Sand looking in the direction of the arrows at said line.

Fig. 3 is an enlarged, detail, fragmentary front elevation showing aportion of the adjusting means, represented as the parts appear when theplaten is adjusted to the normal limit of its forward adjustment.

Fig. 4 .is a view corresponding to Fig. 3 exso cept that the parts aredisposed as they appear when the adjusting means are set in an abnormalposition for stencil cutting.

Fig. 5 is an enlarged, detail, fragmentary vertical sectional view of aportion of the adjusting means; the section being taken on the line 5 5of Fig. 4 and looking in the direction of the arrows at said line.

I have shown my invention in the present instance embodied in a No. 6Remington Noiseless 70 typewriting machine employing carriage adjustingmeans of thesame general character as those disclosed in my Patent No.1,647,827 dated Nov. 1, 1927, modied as hereinafter indicated for theattainment of the ends of the present invention. i

The frame of the machine comprises a lower body portion 1 and a topplate 2. A carriage support 3 has case shift links 4 pivoted thereto at5. The rear ends of the case shift links are so pivoted at 6 todepending ears '.7 on the case shift frame or carriage support 8. Acarriage comprising a supporting bar 9 and end plates 10 is supported onthe ease shift frame 8, by intervening rollers l1, to travel from sideto side of the machine in the usual manner. A cylindrical platen 12 iscarried by the carriage. The usual toggle controlled type actions, notcompletely shown, include type bars having type which are pressedagainst the front face of the platen, and a fragmentary portion of oneof which type bars is shown in Fig. l.

The support 3 is mounted for bodily sliding adjustment fore and aft ofthe machine, being supported at 13 and 14 on a member 15 which is 96secured to the frame of the machine. A forward extension 16 of thesupport 3 underlies a fixed member 1'7 with which the extension 16 has asliding engagement and aids in maintaining the support 3 on the part 15.contractile springs 18 are connected at their forward ends to posts 19secured to the adjustable member 3. The rear ends of these springs areconnected to pins 20 that project from the frame 1 of the machine. Thesesprings are disposed on opposite sides of the center of the machine andexert their force to move the support 3 with the carriage towards therear of the machine. A centrally disposed link 21 is pivotallyvconnected at its rear end, as at 22,`to the adjustable carriage support3 and 110 has ascrew 23 secured thereto at its forward end. This screwis received in an interiorly threaded bushing 24 seated in an opening ina depending flange 2a of the top plate 2 of the machine and is free toturn therein.

A finger piece 25 is connected to a crank arm 26, the outer free end ofwhich is pointed at 27 and constitutes an indicator or pointer that isadapted to cooperate with the segmentally arranged indices 28 on theface of an indicating plate 29. The plate 29 is spaced apart from thefront of the flange 2a byinterveningspacingsleeves 30 and is secured inplace by screws 31. The stems of screws 31 pass through openings in theindicator plate and are received at their threaded ends in tappedopenings in the depending flange 2a of the top plate 2. The innerhub-like end 32 of the crank arm 26 is serrated on one side to formengaging teeth 33 that constitute a clutchlike member or section thatengages corresponding teeth 34 on the forward end of the bushing 24.Effective engagement between the two clutch members 33 and 34 ismaintained by a headed screw 35, the stem of which passes through thehub 32 of the crank arm and is received in the tapped opening in theforward end portion of the bushing 24. The crank arm and bushing 24 arethus fixedly united by firmly tightening the screw 35. The crank arm 26is bent at 36 so as to extend from behind the indicator plate 29 througha cut-out or opening 37 therein to the front of said indicator platewhere it coacts with the indices thereon and its handle 25 is readilyaccessible to the operator to effect a turning adjustment of the bushing24 and thus effect, through the threaded connection between said bushingand the link 21, a fore and aft adjustment of the carriage support. Thisprovides an adjustment of the platen towards and from the type faces.

The construction as thus far described is similar to that disclosed inmy hereinbefore mentioned patent, although in said patented constructionthe crank arm 26 could not be adjusted downwardly beyond -the positionindicated in Fig. 3. In accordance with my present invention I extendthe cut-out 37 in the indicator plate 29 down to a stop face indicatedat 38 so as to aiTord a movement or adjustment of the crank arm incertain circumstances down to the position indicated in Fig. 4, where itis arrested by the bent portion 36 of the crank arm abutting the stopedge 38 of the indicator plate. Under normal conditions, however, thecrank arm could not be adjusted to the Fig. 4 position, but is limitedin the extent of its adjustment in this direction to the position shownin Fig. 3. This I attain by the provision of a spring plate or resilientarresting member 39 secured in position at one end by one of the screws31, and xedly heldin place thereby between the indicator plate and oneof the spacing sleeves 30. This spring member 39 is projected to theleft beyond the indicator plate, as indicated at 40, so as to provide afinger piece by which the member 39 may be flexed from the full to thedotted line position indicated in Fig. 2. The member 39 is provided witha laterally extending lug or stop 41 which extends through the cut-out37 in the indicator plate and into the path of movement of the crank armin an anti-clockwise direction. The effect of the lug 41 when in normalposition is to provide a stop with which the crank arm coacts in theFig. 2 position to prevent further movement of the crank arm in ananti-clockwise direction beyond the zero position indicated in saidfigure. This positon of adjustment of the crank arm corresponds to thefarthest forward adjustment of the platen under the normal conditions ofuse. Should the operator desire to bring the platen farther forward inorder to more effectively cut stencils on a machine, this may be readilydone by the operator flexing the member 39 rearward to the dotted lineposition, indicated in Fig. 2, thereby withdrawing the stop lug 41 fromthe path of the crank arm 26 and enabling the latter to receive afarther downward adjustment to the abnormal Fig. 4 position. The act ofmoving the crank arm to this position brings the stop lug 41 to the rearof the full body portion of the crank arm, thereby maintaining themember 39 fiexed in the rearward position. When, however, the crank armis again adjusted to, or upwardly beyond the position indicated in Fig.3, the lug 41 will snap forward under the spring force of the member 39and be again interposed in the path of the crank arm to limit itsanti-clockwise movement to the position indicated in Fig. 3. If at anytime it should again be necessary or desirable to effect an abnormalforward adjustment of the platen for stencil cutting, it will benecessary for the operator to flex the member 39 rearwardly to thedotted line position, indicated in Fig. 2, in order to move the stop lug41 from the path of the crank arm before such abnormal adjustment can beeffected.

From the foregoing description it will be understood that I haveprovided simple and effective means by which various normal adjustmentsof the platen may be effected without, however, incurring the liabilityof adjusting the platen to the abnormal position required only forstencil cutting, and which is indicated by the position of the crank armin Fig. 4, and that this unusual position or range of adjustment canonly be attained deliberately by the will of the operator and afterfirst flexing the member 39 to the dotted line position indicated inFig. 2, to move the stop lug 41 from the path of the crank arm 26.

It is obvious that when the platen is adjusted to the stencil cuttingposition the usual toggles that control the type actions cannot reach asclose to the straightened position that they do when the platen isadjusted within the usual range required for noiseless writing onvarious thicknesses of paper. The first mentioned adjustment of theplaten may therefore result in the production of some noise which wouldbe objectionable for noiseless writing but nevertheless renders theactions more effective for stencil cutting. It will be seen thereforethat the toggles function somewhat differently when the platen isadjusted for stencil cutting than they do in the usual noiselessprinting operations.

While I have described in detail one specific form of construction ortrain of connections by which the adjustment of the platen may beeffected, it should be understood that any suitable means may beprovided for this purpose as long as the fundamental features of thepresent invention are included and the construction is brought withinthe invention as it is defined in the accompanying claims.

What I claim as new and desire to secure by Letters Patent, is:

1. The combination with the usual toggle controlled noiseless typeactions, of a platen, means for adjusting the platen towards and fromthe type faces to different set positions, said adjustlng means having anormal range of adjustment for the operation of said toggles innoiseless writing on various thicknesses of paper, and means providing afurther adjustment of said platen toward said type faces whereby saidtoggles function with said platen differently than in the noiselessoperation to produce a stencil cutting operation.

2. The combination with the usual toggle controlled noiseless typeactions, of a platen, means for adjusting the platen towards and fromthe type faces to different set positions, said adjusting means having anormal range of adjustment for the operation of said toggles innoiseless writing on various thicknesses of paper, and means providing afurther adjustment of said platen toward said typefaces whereby saidtoggles function with said platen differently than in the noiselessoperation to produce a stencil cutting operation, said last mentionedmeans comprising a stop for limiting the normal range of adjustment ofsaid adjusting means in one direction, and means for removing said stopfrom effective position thus enabling the adjusting means to receive anadjustment in one direction to an unusual or abnormal position.

3. The combination with the usual toggle controlled noiseless typeactions, of a platen, means for adjusting the platen towards and fromthe type faces to different set positions, said adjusting means having anormal range of adjustment for the operation of said toggles innoiseless writing on various thicknesses of paper, and means providing afurther adjustment of said platen toward said type faces whereby saidtoggles function with said platen differently than in the noiselessoperation to produce a stencil cutting operation, said adjusting meanscomprising an indicating scale and pointer, and said means for providinga further adjustment of the platen comprising means controllable at willto enable said pointer to be adjusted beyond the range of said scalewhen it is desired to adjust the platen to stencil cutting position.

4. The combination with the usual toggle controlled noiseless typeactions, of a platen, means for adjusting the platen towards and fromthe type faces to different set positions, said adjusting means having anormal range of adjustment for the operation of said toggles innoiseless writing on various thicknesses of paper, and means providing afurther adjustment of said platen toward said type faces whereby saidtoggles function with said platen differently than in the noiselessoperation to produce a stencil cutting operation, said last mentionedmeans comprising a stop for limiting 'the normal range of adjustment ofsaid adjusting means in one direction, means for removing said stop fromeffective position thus enabling the adjusting means to receive anadjustment in one direction to bring the platen to a stencil cuttingposition, and a second stop for limiting the adjustment of the saidadjusting means within the stencil cutting range.

5. The combination with the usual toggle controlled noiseless typeactions, of a platen, means for adjusting the platen towards and fromthe type faces to different set positions, said adjusting means having anormal range of adjustment for the operation of said toggles innoiseless writing on various thicknesses of paper, and means providing afurther adjustment of said platen toward said type faces whereby saidtoggles function with said platen differently than in the noiselessoperation to produce a stencil cutting operation, said adjusting meanscomprising a manually controlled crank arm at the front of the machine,said means for providing a further adjustment of the platen comprising astop normally in the path of said crank arm, and means that enable saidstop to be shifted at will out ofthe path of said crank arm,

6. The combination with .the usual toggle controlled noiseless typeactions, of a platen, means for adjusting the platen towards and fromthe type faces to different set positions, said adjusting means having anormal range of adjustment for the operation of said toggles innoiseless writing on various thicknesses of paper, and means providing afurther adjustment of said platen toward said type faces whereby saidtoggles function with said platen differently than in the noiselessoperation to produce a stencil cutting operation, said adjusting meanscomprising a manually controlled crank arm. said means for providing afurther adjustment of the platen comprising a resiliently mounted stopnormally in the path of said crank arm and manually shiftablaat will outof the path of said crank arm to afford a movement thereof to stencilcutting position;

GEORGE G. GOING.

